Hey there,

It is impossible to do that currently.

But you can add the following Custom CSS code into Backend > EasyBlog > Themes > Custom CSS:

body #eb.eb-mod.mod_easybloglatestblogs .eb-mod-title {

	font-size: 30px;

	line-height: 3px;

}

You need to change the value to the value that you want.

Do take note that you need to clear all of your caches before you see the changes.